Question

Does anyone know how to work this problem either on paper or on a TI-84 (preferred). I will try to attach the file.

Answer 1

there is a log button on the calculator but it only does base 10 log's

Answer 2

How would I overcome that?

Answer 3

\[\log_{10} \]

Answer 4

log10? is that how I would enter it? I am a step by step person:)

Answer 5

if you want to do logs in other bases you can use this equation
\[\log_{A} B=\log_{C}B/\log_{C}A \]
log (b) base (a) = log (b) base c / log (a) base c

Answer 6

so the c in this case can be 10 since your calculator default only uses it. if you just press the log button on the calculator it already has the base set. eg to do
\[\log_{10}5 \] just enter log 5 on your calculator

Answer 7

so if I wanted to enter the problem in the pic, how would I do that on my TI-84 plus?

Answer 8

make sense?

Answer 9

I will look real quick to see if I get it:)

Answer 10

cool, let me know how it goes

Answer 11

I put in log(10)^5 which game me 1 is that right?

Answer 12

i got that, as long as the original question it \[(\log_{10}10)^{5} \]

Answer 13

U r not going to like me very much after this:) My cal does not show the base of ten unless u put it in. Is it just understood as being ten? Also would u mind walking me through the problem so I can put it in on the cal? We have been trying to figure it out since yesterday:)

Answer 14

yeah, the calculator doesnt show you the base (though there could be some that do). I have a TI-84 plus silver edition. if log is by itself it is understood to be \[\log_{10} \]
just like if you write \[\sqrt{x}\] it is understood that its the squareroot unless otherwise specified

Answer 15

ok, that makes sense

Answer 16

so, the problem in the pic, is the first line to the left. We have the answer from our book, but we do not know how to get it or how to enter it on the cal

Answer 17

what does the question ask you to find?

Answer 18

umm, I will look real quick

Answer 19

find the range from 2.9 to 3.3

Answer 20

do you have other info like the concentration of the hydrogen ion or anything?

Answer 21

i think that is all it gave

Answer 22

did it give you the pH equation or did you just get it from general equations

Answer 23

i think we just went with a general

Answer 24

let me go look at the book more and I will come back later. I do not want you to work on something I messed up:) Thank you for your help!! GOD bless<><

Answer 25

just seems odd for it to only say find the range without indicating what you should be finding the range of.

Answer 26

true:)

Answer 27

I will study some more. I am not able to get to the book right now. Thank you so much for your help!! So sorry it is so confusing. GOD bless<><

Answer 28

no problem, sorry im not more useful, its amazing how much one can become unsure of after a year of not doing chemistry

Answer 29

Hey, u r doing better than I am!! I have not had it in five or six years:)